package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrderDetailMapper;
import com.itheima.reggie.mapper.OrdersMapper;
import com.itheima.reggie.mapper.ShoppingCartMapper;
import com.itheima.reggie.service.AddressBookService;
import com.itheima.reggie.service.OrdersService;
import com.itheima.reggie.service.UserService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {

    @Autowired
    private OrdersMapper ordersMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private UserService userService;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private OrdersMapper orderMapper;


    public R<String> submit(Orders orders) {


//A. 获得当前用户id, 查询当前用户的购物车数据
        Long userId = BaseContext.getCurrentId();
        LambdaQueryWrapper<ShoppingCart> qw = new LambdaQueryWrapper<>();
        qw.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCarts = shoppingCartMapper.selectList(qw);
        if(shoppingCarts==null || shoppingCarts.size()==0){
            throw new CustomException("购物车里为空，不能下单");
        }
//B. 根据当前登录用户id, 查询用户数据
        User user = userService.getById(userId);

//C. 根据地址ID, 查询地址数据
        AddressBook addressBook = addressBookService.getById(orders.getAddressBookId());
        if(addressBook ==null){
            throw new CustomException("地址空，请添加地址");
        }
//D. 组装订单明细数据, 批量保存订单明细


        long orderId = IdWorker.getId();//订单号

        BigDecimal amount = new BigDecimal(0);//总价
        // 4、保存订单明细数据：点了哪些菜品或套餐
        for (ShoppingCart shoppingCart : shoppingCarts) {
            // ShoppingCart shoppingCart --> OrderDetail orderDetail
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(shoppingCart,orderDetail);
            // orderId单独设置
            orderDetail.setOrderId(orderId);
            // amount 金额单独设置 数量  *  单价
            BigDecimal price = shoppingCart.getAmount();
            BigDecimal number = new BigDecimal(shoppingCart.getNumber());
            orderDetail.setAmount(price.multiply(number));
            amount.add(orderDetail.getAmount());//
            orderDetailMapper.insert(orderDetail);
        }


//E. 组装订单数据, 批量保存订单数据

        orders.setId(orderId);//订单id
        orders.setOrderTime(LocalDateTime.now());//订单创建时间
        orders.setCheckoutTime(LocalDateTime.now());//订单结账时间
        orders.setStatus(2);//1待付款，2待派送，3已派送，4已完成，5已取消
        orders.setAmount(amount);//总金额
        orders.setUserId(userId);//用户id
        orders.setNumber(String.valueOf(orderId));//订单号
        orders.setUserName(user.getName());//用户名
        orders.setConsignee(addressBook.getConsignee());//收货人
        orders.setPhone(addressBook.getPhone());//收货人联系电话
        orders.setAddress(
                (addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                        + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                        + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                        + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));//省+市+区域+详细地址
        orderMapper.insert(orders);

//F. 删除当前用户的购物车列表数据
        int delete = shoppingCartMapper.delete(qw);
        return delete>0? R.success("购物车清空成功"):R.error("购物清空失败");
    }
}
